cpython

Clarify that every thread has its own default context in contextvars (#99246)

gh-99925: Fix inconsistency in `json.dumps()` error messages (GH-99926)

gh-100348: Fix ref cycle in `asyncio._SelectorSocketTransport` with `_read_ready_cb` (#100349)

gh-88211: Change lower-case and upper-case to match recommendations in imaplib docs (#99625)

gh-89051: Add ssl.OP_LEGACY_SERVER_CONNECT (#93927)